package com.company;

public class Contact {
    private String name;
    private  String phoneNumber;

    public Contact(String name, String phoneNumber) {
        this.name = name;
        this.phoneNumber = phoneNumber;
    }

    public String getName() {
        return name;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }
    public static Contact createContact(String name, String phoneNumber){
        return new Contact(name,phoneNumber);
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
}
package com.company;

import java.util.ArrayList;

public class MobilePhone {
    private String myNumber;
    private ArrayList<Contact> myContacts;
    public MobilePhone(String phoneNumber){
        this.myNumber = phoneNumber;
        this.myContacts = new ArrayList<>();
    }

    public boolean addNewContact(Contact contact) {
        if (findContact(contact.getName()) >=0){
            System.out.println("Contact is already on name");
            System.out.println("The contact that is already on name has index " + findContact(contact.getName()));
            return false;
        } else {
            myContacts.add(contact);
            System.out.println("A new contact was added to the list");
            return true;

        }
    }

    public boolean removeContact(Contact contact) {
        if(findContact(contact) >=0){
            System.out.println(contact.getName() + "was removed from the contact list");
            this.myContacts.remove(contact);
            return  true;
        }else{
            System.out.println("Contact to be removed was not found in the contact list");
            return false;
        }

    }

    private int findContact(Contact contact) {
        return this.myContacts.indexOf(contact);
    }
    public int findContact(String contactName){
        boolean foundMyContact = false;

        for(int i = 0; i < this.myContacts.size(); i++){
            foundMyContact = true;
            Contact contact = this.myContacts.get(i);
            if (contact.getName().equals(contactName)){

                return i;


            }

        }

        return -1;

    }

    public int getMobilePhoneLength() {
    return this.myContacts.size();
    }
    public String queryContact(Contact contact){
        if(findContact(contact) >= 0){
            return contact.getName();
        } else return null;

    }
    public boolean updateContact(Contact oldContact, Contact newContact){
        int foundPosition = findContact(oldContact);
        if(foundPosition < 0){
            System.out.println("Old contact.getName was not found");
            return false;


        }
        myContacts.set(foundPosition,newContact);
        return true;
    }

    public String getMyNumber() {
        return myNumber;
    }

    public ArrayList<Contact> getMyContacts() {
        return myContacts;
    }
    public String[] myStringArray(){
        Contact[] myContactString = new Contact[myContacts.size()];
        for(int i = 0; i < myContactString.length; i++){
            myContactString[i] = myContacts.get(i);
        }
        String[] myStringArray2;
        myStringArray2 = new String[myContactString.length];
        for(int i = 0; i < myContactString.length; i++){
           myStringArray2[i] = myContacts.get(i).getName();
        }
        return myStringArray2;


    }
    public void printContacts(){
        for (int i = 0; i < myContacts.size(); i++){
            System.out.println("Contact name is  " + myContacts.get(i).getName());

        }

    }

}
package com.company;

import java.util.Scanner;

public class Main {
    private static Scanner scanner = new Scanner(System.in);
    public static  MobilePhone mobilePhone = new MobilePhone("07885599015");


    public static void main(String[] args) {
        boolean quit = false;

        startPhone();
        printActions();

        while(!quit){
            System.out.println("\n Enter action: (6 to show available actions)");
            int action = scanner.nextInt();
            if (action >= 0 && action < 7){
                switch(action){
                    case 0:
                        System.out.println("\nShutting down");
                        break;
                    case 1:
                        printContacts();
                        break;
                    case 2:
                        addContacts();
                        break;
                    case 3:
                        updateContact();
                        break;
                    case 4:
                        removeContact();
                        break;
                    case 5:
                        queryContact();
                        break;
                    case 6:
                        printActions();



                }

            }
            else{
                System.out.println("Invalid input");
            }


        }


    }
    private static void startPhone(){
        System.out.println("Starting phone.......");
    }
    private static void printContacts(){
        mobilePhone.printContacts();
    }

    private static void printActions(){
        System.out.println("\nAvailable actions:\npress");
        System.out.println("0 - to shut down\n"
                + "1 - to print contacts\n"
                + "2 - to add a new  contact\n"
                + "3 - to update an existing contact\n"
                + "4 - to remove an existing contact\n"
                + "5 - to query whether an an input exists\n"
                + "6 - to print a list of existing actions\n"
        );
    }
    private static void addContacts(){
        System.out.println("Enter the name of the contact you would like to add...");
        String contactName = scanner.nextLine();
        scanner.nextLine();
        System.out.println("Enter the phone number of the contact you would like to add...");
        String phoneNumber = scanner.nextLine();

        Contact contact = new Contact(contactName,phoneNumber);
        mobilePhone.addNewContact(contact);
    }

    private static void removeContact(){
        System.out.println("Enter the name of the contact you would like to remove");
        String removedContactName = scanner.nextLine();
        int indexOfRemovedContact = mobilePhone.findContact(removedContactName);
        if(indexOfRemovedContact >=0){
            Contact contactToBeRemoved = mobilePhone.getMyContacts().get(indexOfRemovedContact);
            mobilePhone.removeContact(contactToBeRemoved);
            System.out.println("The mobile phone contact with name " + removedContactName + " has been removed");

        }
        else{
            System.out.println("The name of the contact you have inputted is not in the contact list");
        }

    }
    private static void updateContact(){
        System.out.println("Enter the name of the contact you would like to update...");
        String modifiedContactName = scanner.nextLine();
        int indexOfModifiedContact = mobilePhone.findContact(modifiedContactName);
        scanner.nextLine();
        System.out.println(indexOfModifiedContact);

        System.out.println("Would you like to change the name of the contact you would like to change? (input yes or no)");
        String BooleanOfName = scanner.nextLine();
        BooleanOfName.toLowerCase();
        System.out.println(BooleanOfName);
        if (BooleanOfName.equals("yes")){
            System.out.println("Enter the new name of the contact");
            String newContactName = scanner.nextLine();
            mobilePhone.getMyContacts().get(indexOfModifiedContact + 1).setName(newContactName);



        }
        else if (BooleanOfName == "no"){
            System.out.println("You do not want to change the inputted contact");

        } else {

            System.out.println("You did not enter either yes or no");

        }
        System.out.println("Would you like to change the phone number of the contact you would like to change?(input YES or NO ");
        String BooleanOfName2 = scanner.nextLine();
        BooleanOfName2.toLowerCase();
        if (BooleanOfName2 == "Yes"){
            System.out.println("Enter the new phone number of the contact");
            String newPhoneNumber = scanner.nextLine();
            mobilePhone.getMyContacts().get(indexOfModifiedContact).setPhoneNumber(newPhoneNumber);
        }
        if (BooleanOfName2.equals("no")){
            System.out.println(BooleanOfName2 + " Was not edited");
        }

    }
    private static void queryContact(){
        System.out.println("Enter the name of the contact you would like to query");
        String queryContactName = scanner.nextLine();
        scanner.nextLine();
        int indexOfQueriedContact = mobilePhone.findContact(queryContactName);
        System.out.println(indexOfQueriedContact);
        if(indexOfQueriedContact >=0){
            System.out.println("The item you entered exists in the list and has position " + indexOfQueriedContact);

        }else {
            System.out.println("The item you entered does not exist in the contact list");
        }

    }



}